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NPS_Watch Jun 11, 2018
#1
The Daily Dose - Exposing the nuclear power industry while the nuclear power industry exposes you.

[ yesterdays report, botched login, couldn't recover before had things to do. ]

There are 9 EN(s) today, 2 associated with power stations.

[ Both Ens are for Browns Ferry unit 1 and both deal with leaks in the HPCI. ]
[ It's unclear if the leaks were repaired or they just decided they didn't need to be reported. ]

[ BTW all three are GE BWR 4 with Mark 1 containments. ]

NRC Event Notices for June 11, 2018    
https://www.nrc.gov/reading-rm/doc-colle...611en.html
[ page nav not working, event date/time not being reported. ]
----------------------------------------------------------------------------------------------------------------------------------------------------
----------------- Power Reactor Event Notices
----------------------------------------------------------------------------------------------------------------------------------------------------

----------------------------------------------------------------------------------------------------------------------------------------------------
----------- [ Current event for AL_BrownsFerry_1 ]

20180608 | AL_BrownsFerry_1 | Retract HIGH PRESSURE COOLANT INJECTION SYSTEM INOPERABLE |
https://www.nrc.gov/reading-rm/doc-colle...ml#en53340

"At 0416 CDT on April 17, 2018,
the High Pressure Coolant Injection System (HPCI) was isolated due to a water side leak from the gland seal condenser.

Unit 1 HPCI remains inoperable pending repairs to the gland seal condenser.

"This condition is being reported pursuant to 10 CFR 50.72(b)(3)(V)(D),
'Any event or condition that at the time of discovery could have prevented the fulfillment of the safety function
of structures or systems that are needed to mitigate the consequences of an accident.'
This is also reportable as a 60-day written report in accordance with 10 CFR 50.73(a)(2)(V)(D).

"There was no impact on the health and safety of the public or plant personnel.
The NRC Resident Inspector has been notified of this event."

* * * RETRACTION ON 6/8/18 AT 1500 EDT FROM BILL BALL TO BETHANY CECERE * * *

"ENS Event Number 53340, made on 4/17/2018 is being retracted.

"NRC notification 53340 was made to ensure that the Eight-Hour Non-Emergency reporting requirements of 10 CFR 50.72 were met when a leak was identified on U1 HPCls Gland Seal Condenser.

"A Past Operability Evaluation [POE] was performed under CR# 1406178.
The evaluation concluded that HPCI was degraded, but met the threshold for TS operability.

Specifically the POE states that if the leak was left unaddressed for 8 hours (mission time) with HPCI in operation,
the additional volume of water that would accumulate on the HPCI room floor would be approximately 5520 gallons
which would be within the capacity of the floor drain pumps and spill over into Torus area to prevent water level
from reaching a value which would preclude operation of HPCI critical components.

Additionally the leak was upstream of the system flow controller,
so the leakage rate of 11.5 gpm would not affect the ability of the HPCI pump to provide rated flow of 5000gpm.
[ So where's all that leaking coolant going? ]
[ It goes into storage tanks and then is trickled out a little at a time. ]

"As such, the circumstances discussed in the report did not result in any condition that at the time of discovery
could have prevented the fulfillment of the safety function of structures of system that are needed to remove residual heat.

Thus, there was no impact on nuclear safety. Therefore, this event is not reportable under 10 CFR 50.72(b)(3)(v)(B).

"TVA's evaluation of this event notification is documented in the corrective action program.



------------------------

20180608 | AL_BrownsFerry_1 | Retract ACCIDENT MITIGATION - HIGH PRESSURE COOLANT INJECTION DECLARED INOPERABLE |
https://www.nrc.gov/reading-rm/doc-colle...ml#en53014


"On October 13, 2017 at 1700 CDT, Unit 1 High Pressure Coolant Injection (HPCI) was declared Inoperable
due to discovery of a leak on a sensing line to 1-PCV-073-0043,  Lube Oil Cooler & Gland Seal Condenser Pressure Control Valve.

The leak is a steady stream located where the sense line connects to the valve.

"This constitutes an unplanned HPCI System inoperability and requires an 8 hour ENS notification in accordance with 10 CFR 50.72(b)(3)(v)(D),
due to the failure of a single train system affecting accident mitigation and a 60 day written report in accordance with 10 CFR 50.73(a)(2)(v)(D)."

The NRC Resident Inspector has been notified by the Licensee.


* * * RETRACTION ON 6/8/18 AT 1500 EDT FROM BILL BALL TO BETHANY CECERE * * *

"ENS Event Number 53014, made on 10/13/2017 is being retracted.

"NRC notification 53014 was made to ensure that the Eight-Hour Non-Emergency reporting requirements of 10 CFR 50.72 were met
when a leak on a threaded union, along with piping vibration,
was identified on U1 HPCls Lube Oil Cooler & Gland Seal Condenser Pressure Control Valve sensing line (1-PCV-073-0043).

"A Past Operability Evaluation [POE] was performed under CR# 1347736.

The evaluation concluded that HPCI was degraded, but met the threshold for TS operability.

Specifically the vibrations shown were evaluated and deemed to not impact pipe integrity.

These vibrations were also evaluated for seismic events.

Based on this the POE concluded that HPCI was capable of performing its intended safety function for its designed mission time.

"As such, the circumstances discussed in the report did not result in any condition that at the time of discovery could have prevented
the fulfillment of the safety function of structures of system that are needed to remove residual heat.

Thus, there was no impact on nuclear safety. Therefore, this event is not reportable under 10 CFR 50.72(b)(3)(v)(B).

"TVA's evaluation of this event notification is documented in the corrective action program.

[ Notice the dates between the two ENs , Oct 2017 and April 2018, leaking all that time ? ]

----------- [ 2018 event history for AL_BrownsFerry ]

20180417 | AL_BrownsFerry_1 | HIGH PRESSURE COOLANT INJECTION SYSTEM INOPERABLE |
https://www.nrc.gov/reading-rm/doc-colle...ml#en53340


20180403 | AL_BrownsFerry_3 | Exit RFO

20180329 | AL_BrownsFerry_1;2;3 | UNANALYZED CONDITION DUE TO INOPERABILITY OF EMERGENCY EQUIPMENT COOLING WATER PUMP |
https://www.nrc.gov/reading-rm/doc-colle...ml#en53300
[ AL_BrownsFerry_1;2;3 @ 100;100;0 RX Mode: PO;PO;Cold Shutdown ]

20180322 | AL_BrownsFerry_1;2;3 | Update PART 21 - UNDERSIZED PACKING GLANDS IN CERTAIN CRANE GATE VALVES     
https://www.nrc.gov/reading-rm/doc-colle...ml#en53246
[ This EN is missing as of 04/18/2018 ]

20180318 | AL_BrownsFerry_1 | AUTOMATIC REACTOR SCRAM DUE TO TURBINE CONTROL VALVE CLOSURE |
https://www.nrc.gov/reading-rm/doc-colle...ml#en53269

20180316 | AL_BrownsFerry_1;2;3 | UNANALYZED CONDITION AFFECTING RESIDUAL HEAT REMOVAL SYSTEM |
https://www.nrc.gov/reading-rm/doc-colle...ml#en53267
[ AL_BrownsFerry_1;2;3 @ 100;100;0 RX Mode: PO;PO;Refueling ]

20180307 | AL_BrownsFerry_1;2;3 | NOTIFICATION OF UNUSUAL EVENT DECLARED |
https://www.nrc.gov/reading-rm/doc-colle...ml#en53247
[ AL_BrownsFerry_1;2;3 @ 100;100;0 RX Mode: PO;PO;Refueling ]

20180306 | AL_BrownsFerry_1;2;3 | Update PART 21 - UNDERSIZED PACKING GLANDS IN CERTAIN CRANE GATE VALVES |
https://www.nrc.gov/reading-rm/doc-colle...ml#en53246

20180217 | AL_BrownsFerry_3 | Begin RFO


20180110 | AL_BrownsFerry_3 | AUTOMATIC REACTOR SCRAM DUE TO TURBINE CONTROL VALVE FAST CLOSURE SCRAM SIGNA |
https://www.nrc.gov/reading-rm/doc-colle...ml#en53162



--------------------------------------------------------------------------------------------------
----------- [ Current event for
----------- [ 2018 event history for

--------------------------------------------------------------------------------------------------
----------- [ Part 21 Notice ]
----------------------------------------------------------------------------------------------------------------------------------------------------
----------------- Other reactor info from daily power tracking
-----------------------------------------------------------------------------------------------------------------

[ Numerous power drops with no EN reports. ]


Region 1

NJ_Hope_Creek_1 @ 96 % down from 100 % Sunday, dropped to 77 % Saturday, no EN, reason for power drop unk.

PA_Limerick_1 @ 97 % up from 40 %, dropped to 63 % Saturday, no EN, reason for power drop unk.

NJ_Oyster_Creek_1 @ 100 % up from 98 %, no EN, reason for power drop unk.

PA_Peach_Bottom_3 @ 93 % up from 63 % ; 46 % ; 42 % Friday, no EN, reason for power drop unk.

MA_Pilgrim_1 @ 99 % up from 98 %, no EN, reason for power drop unk.

NJ_Salem_1 @ 90 % down from 100 %, no EN, reason for power drop unk.



Region 2


AL_Browns_Ferry_3 @ 92 %
[ Unit unable to achieve full power since exiting RFO Apr 03 ] ( used 45 of typ 43 days )

NC_Brunswick_1 @ 100 % Saturday, up from 89 % ; 99 % ; 89 % ; 94 % ; 55 % ; 52 % Satuday, no EN, reason for drop unk.



Region 3

IL_Quad_Cities_1 @ 100 % up from 62 %, no EN, reason for power drop unk.

IL_Quad_Cities_2 @ 85 % down from 100 %, no EN, reason for power drop unk.



Region 4

AR_Arkansas_1 @ 98 % ; 98 % ; 98 % : 98 % ; 97 % ; RFO restart ( used 44 of typ 35 )
[ unit unable to achieve full power after RFO ]

WA_Columbia_2 @ 85 % up from 65 %  - transformer problem

NE_Cooper_1 @ 100 % up from 99 % ; 97 % ; 96 % ; 82 % ; 70 % ; 0 %, no EN, reason for drop unk.

LA_RiverBend_1 @ 100 % Saturday up from 94 % ; 99 % ; 85 % ; 91 % ; 83 % ; 67 % Sunday, dropped to 64 % Saturday, n EN, reason for drop unk.




----------------------------------------------------------------------------------------------------------------------------------------------------

[ There are currently 0 units with the RPV open - ref the Current ReFueling Outage Schedule and Status ]

posted by Staup Knewkinus a Dane Gerous production. All human rights reserved.
 
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